On Mon, Feb 11, 2019 at 10:13 AM Paul Gilmartin <
0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
> On Mon, 11 Feb 2019 06:43:14 -0600, John McKown wrote:
> >
> >One thing that I sometimes do is include a FREE=CLOSE on a DD if I am
> >certain that the application will only read if once, say at start up, for
> >configuration information.
> >
> How does that work if a subsequent job step contains a DD statement for
> the same DSN?
>
> I would guess that the control blocks for the job step (TIOT? JFCB?) are
> cleaned up but the initiator continues to hold the ENQ.
>
> Or just a JCL error?
>
> And something similar should apply to a BPXWDYN('free') of a DSN allocated
> by JCL.
>
> And if a program redundantly ALLOCATEs then FREEs a DSN allocated in
> JCL? Does GRS maintain a reference count of the ENQ QHAME/RNAME?
>
> -- gil
>
Excellent questions! I was blinded by an assumption that the address space
was a single step started task.
--
I just burned 2000 calories!
That's the last time I'll nap with brownies in the oven.
Maranatha! <><
John McKown
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
